Rates of, and factors associated with, common mental disorders in homeworking UK Government response employees’ during COVID-19: a cross-sectional survey and secondary data analysis

Introduction Working on the frontline during the COVID-19 pandemic has been associated with increased risk to mental health and wellbeing in multiple occupations and contexts. The current study aimed to provide an insight into the rate of probable mental health problems amongst United Kingdom (UK) Government employees who contributed to the COVID-19 response whilst working from home, and to ascertain what factors and constructs, if any, influence mental health and wellbeing in the sample population. Method This paper reports on the findings from two studies completed by UK Government employees. Study 1: A cross-sectional online survey, containing standardised and validated measures of common mental health disorders of staff who actively contributed to the COVID-19 response from their own homes. Binary logistic regression was used to assess factors associated with mental health outcomes. Study 2: A secondary data analysis of cross-sectional survey data collected across three timepoints (May, June, and August) in 2020 focusing on the wellbeing of employees who worked from home during the COVID-19 pandemic. Results Study 1: 17.9% of participants met the threshold criteria for a probable moderate anxiety disorder, moderate depression, or post-traumatic stress disorder. Younger, less resilient, less productive individuals, with lower personal wellbeing and less enjoyment of working from home, were more likely to present with poorer mental health. Study 2: Found lower wellbeing was consistently associated with having less opportunities to look after one’s physical and mental health, and having unsupportive line managers and colleagues. Conclusion It is important to ensure UK Government employees’ psychological needs are met whilst working from home and responding to enhanced incidents. It is recommended that workplaces should be seeking to continually build and improve employee resilience (e.g., through opportunities to increase social ties and support networks), essentially ensuring employees have necessary resources and skills to support themselves and others. Supplementary Information The online version contains supplementary material available at 10.1186/s40359-024-01921-4.


Introduction
On the 11th of March 2020, the World Health Organisation declared a global pandemic due to a novel coronavirus, COVID-19 [1].Within the UK, the Government put in place many behavioural interventions with the aim of reducing transmission of the virus, which highly impacted usual day to day life for the public.For example, restricting how many times, and under what conditions, an individual could leave their home, as well as highly restricting social opportunities.As of the 16th of March 2020, the public were instructed to "start working from home where possible" [2].
Nearly half of those in employment were reported to work from home the following month (April 2020; [3]), a vast increase in comparison to pre-pandemic estimates of around 5% [4].Prior to the COVID-19 pandemic, research surrounding working from home was mixed in impact.For some, it was often seen as advantageous (e.g., in terms of decreasing or eliminating commuting time; [5]) and for others more challenging (e.g., in relation to blurred boundaries between work and home life; [6]).

Working from home during and post COVID-19
More recent systematic reviews of literature (i.e., post 2020) have established that working from home can have a mixed impact on mental health, wellbeing, productivity [7] and employee performance [8].For example, a recent systematic review examining 27 papers (including both peer reviewed and grey literature) sought to establish whether there is an association between working from home and both mental health and productivity; specifically, for those who experienced working from home during the COVID-19 pandemic.In terms of mental health, many outcomes were examined by the included papers (e.g., but not limited to, depression, stress, psychological distress, mental wellbeing).Many of the included papers (n = 15) reported a negative relationship between homeworking, mental health, and wellbeing, with some concluding a mixed effect (n = 3) and others no effect (n = 2).Similar findings were also reported for productivity outcomes.The review essentially showcases that working from home can benefit some, and disadvantage others.As a result of varied findings, examination of personal and practical factors that may impact the relationship between working from home and mental health were also carried out in the review.In summary, being female, older in age, living and working in a crowded or confined home, or having young children at home were consistently associated with worsened mental health.Establishing that demographic factors and contextual factors (e.g., people in the household when working from home) may influence mental health and wellbeing outcomes.
These findings align with other research in the field that also states that variation in experiences of working from home is often reported due to a plethora of contextual and situational factors [8,9].To demonstrate factors associated with working from home, a recent umbrella review (i.e., review of reviews) was conducted by the current research team.The review identified a large number of apparent factors (19 in total) related to employee experience.These factors related to working environment (e.g., workplace design, space conditions), personal impact (e.g., satisfaction, career impact), and health (e.g., physical health, well-being) ( [9], p.1).The review reports the majority of all derived factors to be mixed in outcome (e.g., some employees have access to appropiate space and equipment whereas others do not; some employees find working from home to positively impact their wellbeing where others do not), again confirming the variety of experiences when working from home -as home environments and employee's personal preferences differ.Therefore, it is important to gain clarity on which factors most impact wellbeing outcomes, in order to be able to mitigate and offer support to those most as risk of poorer wellbeing when working from home.

Challenges with working from home
The concept of working from home also raises new challenges.For example, two recent literature reviews found that isolation and lack of social connection having a negative impact on mental health and wellbeing was consistently noted across the literature [7,9].When working disparately, and communicating purely online, homeworking employees may lose the ability to create a shared sense of social identity with colleagues [10], the extent to which group members perceive themselves as part of a collective 'us' or 'we' (rather than 'I' and 'me').Social group membership has the capacity to serve as a 'social cure' , often considered an independent protective factor against ill health, particularly when there is strong identification among group members [11].However, group identification can also be considered a 'social curse' , and hinder positive outcomes, particularly if group members do not provide levels of social support expected [12].More generally, the importance of social support has been showcased in recent reviews [13], and has also been found to be protective of workplace stress [14] and burnout [15].Therefore, establishing the impact of social support and identify on mental health outcomes of those working from home may aid in tailoring interventions for improving experience.

Current research focus
In summary, the impact of working from home has been mapped in terms of mental health, wellbeing, and productivity.Consistently, mixed findings are apparent, with many reports establishing an equivocal or negative impact at best.In the context of continued mixed findings, it may be beneficial to take a job-specific approach, to potentially minimise additional extraneous factors [9].The mental health and wellbeing impact of the COVID-19 pandemic for various occupations working on the frontline are well documented and consistently noted as negative.For example, in relation to hospital workers [7,16] teachers [17] and social workers [18].One group who have received less attention are civil servants.UK civil servants who were contributing to, and providing, effective delivery of the coronavirus response are considered frontline employees [19] and were thus at high risk of the combined demands of working from home and frontline demands.
More general research established that 98% of UK civil servants were working from home in July of 2020 [20].Recent work suggests that civil servants were likely to face a series of unmet needs in relation to their remote workplace and resources due to the sudden change to the way of working and, as a result, many of the preparatory steps recommended for effective remote working (e.g., ensuring safe, comfortable and appropiate remote workplaces and technical equipment [9,21]) could not be carried out in time [22].Civil servants during the COVID-19 pandemic were reported to face very high job demands [23].Additionally, a decrease in personal wellbeing (i.e., in terms of life satisfaction, happiness, anxiousness, and belief that things in life are worthwhile was also apparent from a series of Civil Service data [24].
The current research used a two-study approach to explore the wellbeing of response-focused UK Civil Servants who worked from home during the COVID-19 pandemic and were from one select government organisation.Study 1 used a cross-sectional survey to establish the rate of probable mental health problems using standardised and validated measures, and to ascertain what factors and constructs, if any, influenced mental health in the sample population.Study 2 involved secondary data analysis of three cross-sectional surveys with UK civil servants who were working from home over the COVID-19 pandemic, which sought to compliment Study 1 by providing further clarity on potential risk and resilience factors for wellbeing.

Survey design
An online cross-sectional survey was used to understand participants' experiences and perceptions of working from home.The survey consisted of three main parts: (1) demographic and professional questions; (2) experiences and perceptions of working from home; (3) various measures relating to mental health and wellbeing, resilience, and productivity.The findings from this survey have been split into two papers (please see: [25]), the current focuses on parts one and three.Data collection occurred between 1 May and 1 August 2022.Qualtrics was used to build and host the survey, it was estimated that the questionnaire took between five to ten minutes to complete.

Survey distribution
All participants were recruited from one select UK Government response-focused organisation.Participants were firstly recruited via UK Government team and department leads (or equivalent) acting as gatekeepers, who cascaded information about the study via an email containing a study summary, participant information sheet and the survey link.Initial plans were to collect data within one month (1st of May to 1st of June 2022), but responses were initially slow (only around 20 responses in the first month); potentially due to small or overlapping gatekeeper distribution, as well as trying to recruit a busy workforce.The survey response period was then lengthened (May 1st -August 1st), and distributed twice using an organisational weekly newsletter, which generated more responses.After conversing with the email secretary who distributes the newsletters, it is estimated that the newsletter was delivered to over ten thousand employees, with around 20% opening the email.

Selection criteria
To take part in this research participants needed to be over the age of 18 and have experience of working from home on the UK Government on the COVID-19 response.Participants were required to have reached the end of the survey in order to be included in data analysis.

Ethics
The current study was carried out in accordance with the British Psychological Society Code of Ethics and Conduct [26], and was approved by the King's College London Ethics Committee (reference number: HR/DP-21/22-26693).Informed consent to participate was obtained from all participants in the study using the first page of the survey.To mitigate any pressure that may be felt by potential participants as a result of using gatekeepers, participants were assured that the gatekeeper would not know who took part in the survey.Additionally, the participant information sheet and survey both state that nobody within the organisation would know if they participated in the study or not.Participants were made aware that their participation was voluntary, and their data would be anonymised.Participants were also able to stop at any point during the survey.

Study materials
The survey included a range of demographic and professional information, homeworking preference, mental health, wellbeing, resilience, productivity, and items related to social support.A copy of the survey is presented in Appendix 1.

Demographic and professional information
Participants were firstly asked a filter question: 'Have you worked on the COVID-19 response?' and if participants answered they had not worked on the COVID-19 response, they were filtered out from the survey.For demographic factors, participants were asked for their age, ethnicity, and sex.They were also asked for the number of people living in their household and whether there were any children living in the household.For professional information, participants were asked whether they currently (at the time of completing the survey) worked on the COVID-19 response, their length of time with the organisation and pay grade.

Homeworking preferences
To assess perception of homeworking participants were asked to answer, using a 10-point Likert scale (1 = not at all, 10 = completely), the following statement: "I enjoy working from home".This measure was created by the research team.Participants were then able to indicate their future way of working preference by answering the question "In the future, I would like to…" and selecting one of the following answers: 'full time homework'; 'full time office work'; 'work from both home and the office (hybrid arrangement)' .

Anxiety
The 7-item Generalized Anxiety Disorder (GAD; [27]) scale was used to measure probable anxiety disorder.This scale was chosen due to the standardised and validated nature [28] of the survey.Additionally, as this scale is widely used (e.g., [16,29,30]) it provides the opportunity to compare across other populations and samples.The GAD uses a 4-point Likert-scale ranging from 'Not at all' (equalling a score of 0) to 'Nearly every day' (equalling a score of 3) to assess how often an individual has been bothered by various anxiety symptoms over the past two weeks, with a higher score indicating higher levels of anxiety.Assessed symptoms include: "Not being able to stop or control worrying?"and "Being so restless that it is hard to sit still?".In the current study, a score of > 9 was coded to indicate probable moderate anxiety disorder, and a score of > 15 coded to indicate severe anxiety disorder (in line with [27]).The Cronbach's alpha coefficient for the current study was 0.90.

Depression
The 9-item Patient Health Questionnaire (PHQ; [31]) was used to measure probable depression.This scale was chosen due to the standardised and validated nature [31] of the survey.Additionally as this scale is widely used (e.g., [16,29,30,32]) it provides the opportunity to compare across other populations and samples.The PHQ uses a 4-point Likert-scale ranging from 'Not at all' (equalling a score of 0) to 'Nearly every day' (equalling a score of 3) to assess how often an individual had been bothered by various depressive symptoms in the previous two weeks, with higher scores indicating higher levels of depression.Assessed symptoms include: "Feeling down, depressed, or hopeless?"and "Trouble concentrating on things, such as reading the newspaper or watching television?".In the current study, a score of > 9 was coded to indicate probable moderate depression, and a score of > 19 coded to indicate severe depression (in line with [31]).The Cronbach's alpha coefficient for the current study was 0.88.

PTSD
The 6-item Post-Traumatic Checklist -Civilian Version (PCL-C; [33]) was used to measure probable PTSD.This scale was chosen due to the standardised and validated nature in nonclinical samples [34].Additionally, as this scale is commonly used (e.g., [16,30,35]) it provides the opportunity to compare across other populations and samples.The PCL-C uses a 5-point Likert-scale ranging from 'Not at all' (equalling a score of 1) to 'Extremely' (equalling a score of 5) to assess how often an individual has been bothered by various problems/complaints indicative of post-traumatic stress over the past month, with higher scores indicating higher levels of post-traumatic stress.Assessed problems/complaints include: "Feeling very upset when something reminded you of a stressful experience from the past?" and "Feeling irritable or having angry outbursts?".A score of > 17 was coded to indicate probable PTSD (in line with [36]).The Cronbach's alpha coefficient for the current study was 0.89.

Personal wellbeing
Participants were asked to answer the following single questions using an 11-point Likert scale ranging from 0 (not at all) to 10 (completely): (1) "Overall, how satisfied are you with your life nowadays?",(2) "Overall, to what extent do you feel that the things that you do in life are worthwhile?",(3) "Overall, how happy did you feel yesterday?",(4) "Overall, how satisfied are you with your job nowadays?".The first three listed questions are in their original form and are regularly used by the Office for National Statistics [37], and the fourth was adapted by the researcher team to assess job satisfaction.These measures are widely used to measure personal wellbeing [38] and are also concurrent with Study 2. In the current study, a score of > 6 was coded to indicate high satisfaction, happiness, or belief of a worthwhile life, in line with [37].

Resilience
The 6-item Brief Resilience Scale (BRS; [39]) was used to measure resilience.The questionnaire was used in its original form and chosen for the ability to measure personal resilience [39] whilst also minimising participant burden.The BRS uses a 5-point Likert scale ranging from 'Strongly disagree' (equalling a score of 1) to 'Strongly agree' (equalling a score of 5) to answer a series of statements related to resilience, for example "I have a hard time making it through stressful events" or "It does not take me long to recover from a stressful event".Three out of six statements are reverse coded.Scores were summed and an average calculated, with a higher score indicating higher levels of resilience.A score of 1.00-2.99 was categorised as low resilience, 3.00-4.30as normal resilience, and 4.31-5.00as high resilience, in line with [39].The Cronbach's alpha coefficient for the current study was 0.88.

Job performance
The 18-item Individual Work Performance Questionnaire (IWPQ; [40]) was used to measure job performance.The questionnaire was used in its original form and was chosen due to the ability to measure individual work performance, which is particular important when employees are working from their own homes.Additionally, the questionnaire is deemed to be reliable and valid [40].The questionnaire measures three dimensions of job performance: Task performance (e.g., "I managed to plan my work so that it was done on time"; TP), Contextual performance (e.g., "I started new tasks myself, when my old ones were finished"), and Counterproductive work behaviour (e.g., "I complained about unimportant matters at work").The IWPQ uses a 5-point Likert-scale ranging from 'Seldom' (equalling a score of 0) to ' Always' (equalling a score of 4) for task and contextual performance, and 'Never' (equalling a score of 0) to 'Often' (equalling a score of 4) for counterproductive work behaviour.Scores are summed for each scale and an average calculated, with a higher score indicating higher levels of performance for TP and CP, and a lower score indicating less CWB.For TP, a score of up to 2.16 was categorised as low performance, 2.17-2.99 as average, and more than 3.00 as high (in line with [41]).For CP, a score of up to 1.87 was categorised as low performance, 1.88-2.87as average, and more than 2.88 as high (in line with [41]).For CWB, a score of up to 0.79 was categorised as low levels of behaviour, 0.80-1.59as average, and more than 1.60 as high [41].The Cronbach's alpha coefficient values for the current study were 0.83 (TP); 0.87 (CP); and 0.80 (CWB).

Social support and identities
Identification with others was measured using adapted versions of two identification questions [42] using a 7-point Likert scale ranging from 'Not at all' (equalling a score of 1) to 'Definitely' (equalling a score of 7).The items were: "I identify with others in my workplace" and "I feel strong ties with others in my workplace".Scores were summed and an average calculated, with a higher score indicating higher levels of identification with the workplace.The Cronbach's alpha coefficient for the current study was 0.83.
Social support was measured using adapted versions of four identification questions [43] using a 7-point Likert scale ranging from 'Not at all' (equalling a score of 1) to 'Definitely' (equalling a score of 7).The items were: "Do you get the emotional support you need from other people?", "Do you get the help you need from other people?", "Do you get the resources you need from other people?" and, "Do you get the advice you need from other people?".Scores were summed and an average calculated, with a higher score indicating higher levels of social support.The Cronbach's alpha coefficient for the current study was 0.89.
Having multiple identities (i.e., sense of belonging to groups, usually associated with better adjustment and greater well-being [44]) was measured using adapted versions of four identification questions [43] using a 7-point Likert scale ranging from 'Not at all' (equalling a score of 1) to 'Definitely' (equalling a score of 7).The items were: "Before the COVID-19 pandemic I belonged to lots of different groups", "Before the COVID-19 pandemic I joined in the activities of lots of different groups", "Before the COVID-19 pandemic I had friends who were members of lots of different groups" and, "Before the COVID-19 pandemic I had strong ties with lots of different groups".Scores were summed and an average calculated, with a higher score indicating higher levels of multiple identities.The Cronbach's alpha coefficient for the current study was 0.96.
Identity continuity (i.e., sense of remaining a member of groups over time or throughout event, associated with good wellbeing in the workplace [45]) was measured using adapted versions [43] of four identification questions using a 7-point Likert scale ranging from 'Not at all' (equalling a score of 1) to 'Definitely' (equalling a score of 7).The items were: "I still belong to the same groups I was a member of before the start of the COVID-19 pandemic", "I still join in the same group activities as I did before the start of the COVID-19 pandemic", "I am friends with people in the same groups as I was before the start of the COVID-19 pandemic" and, "I continue to have strong ties with the same groups as I did before the start of the COVID-19 pandemic".Scores were summed and an average calculated, with a higher score indicating higher levels of multiple identities.The Cronbach's alpha coefficient for the current study was 0.94.

Analysis
Descriptive statistics to describe the sample population were firstly calculated using counts and percentages.These were also used to establish the rate of probable depression, anxiety, and PTSD in the sample.Due to high rates of correlation between each of the measures of mental health (r ≥ .80), a binary variable coined 'any mental disorder' (AMD) was created to indicate presence of probable moderate anxiety disorder (as measured by the GAD-7), probable moderate depression (as measured by the PHQ-9) and/or probable PTSD (as measured by the PCL-6).The approach of creating a composite variable due to high correlation between mental health outcomes aligns with other previously published methods of analysis (e.g., in [16,30]).A series of binary logistic regressions were then conducted which investigated univariable associations between presence of a probable common mental health disorder (AMD) and each of the predictor variables (demographics (e.g., age, ethnicity, gender), personal factors (e.g., living situation), occupational factors (e.g., length of time with organisation, whether working from home is enjoyed), resilience, productivity, wellbeing (e.g., satisfaction, happiness), and, social identity (e.g., social support, multiple identities).All data analysis was carried out using SPSS V27 [46].

Power
An a-priori binary logistic regression power analysis was conducted on G*power 3.1 [47].Treating AMD as the outcome, with the significance level set at 0.05, power of 0.8, H 0 value of 0.16 (assuming a baseline prevalence of 16%, as literature reports one in six employees in the UK have a mental health condition [48]) and a H 1 value of 0.26 (assuming a 10% increase in a COVID-19 affected sample -in line with frontline worker psychopathology prevalence derived from a COVID-19 related meta-review [49]), indicated that 523 participants were required for analysis.Multivariable binary logistic analyses were planned after univariable regressions but were not completed due to low levels of power after recruitment issues.The results below should be interpreted as preliminary pilot data which provides a snapshot of probable incidence of common mental health issues in response-focused UK civil servants during the COVID-19 pandemic, and associated factors.

Results
In total, the survey link was clicked 246 times.87 records were excluded due to incompletion, and a further 14 were filtered out from the survey for not meeting the eligibility criteria (i.e., due to not having experience of working from home during the COVID-19 pandemic).This resulted in an overall sample size of n = 145, which was below the desired power.This is discussed in more detail in the limitations.

Sample characteristics
Table 1 displays the characteristics of the sample used within the current study.In general, the majority of respondents were female, white, between the ages of 35-44, did not live alone nor have children in the household, and were currently working on a COVID-19 focused role at the time of completing the survey.

Risk and resilience factors
Table 1 displays the associations between presence of AMD and various demographic, professional, and personal categorical predictor variables.Significant associations indicated: employees aged between 18 and 34 were over three times more likely to experience AMD in comparison to those aged 45+; employees with higher resilience were less likely to experience AMD than those with low resilience; employees with low task performance were over four times more likely to experience AMD in comparison to those with high task performance; and, employees who reported low or average levels of counterproductive behaviour were less likely to experience AMD.Employees reporting to enjoy working from home were significantly less likely to experience AMD.

Summary
In summary, Study 1 established that 17.9% of the sample of UK Government employees met the threshold criteria for probable moderate anxiety, moderate depression, or post-traumatic stress disorder.Univariable binary logistic regressions suggest that younger, less resilient, less productive individuals, with less enjoyment for working from home, were more likely to present with poorer mental health.

Study 2 Method
Data Cross-sectional secondary data analysis was conducted on data collected by one UK Government response-focused organisation (the same as in Study 1) across three time points (May, June, and August of 2020)   using an online survey.The survey sought to monitor and support UK Government employee's wellbeing during the COVID-19 incident and response within their organisation.The survey was designed to take between five to ten minutes to complete and included standardised questions to allow comparisons.It was confidential and anonymous, and distributed using internal newsletters and word of mouth (e.g., in team meetings, briefings).

Study materials
The survey included a range of demographic and professional information alongside measures of wellbeing, and workplace support and environment.

Demographic and professional information
Participants were firstly asked questions related to their age, gender, ethnicity and household location: Participants were asked to select their age from the following choices: ' Participants were also asked to report on whether they experience any long term physical or mental health conditions using 'Yes' , 'No' or 'Prefer not to say' , as well as if they are a carer (i.e., care for dependents or give help/ support to any family members or others) using 'Yes' , 'No' or 'Prefer not to say' .
Participants were asked to also to report the way in which they were currently working from the following choices: 'Working solely on Covid-19'; 'Working solely on Business as usual [BAU]'; 'Working on a combination of BAU and Covid-19', or 'Prefer not to say', whether they had made use of workplace support during the Covid 19 pandemic and were provided multiple options to select from.

Workplace support
Participants were asked to answer the following questions using an 11-point Likert scale ranging from 0 (not at all) to 10 (completely): (1) "My line manager helps and supports me", (2) "My colleagues help and support me".

Working environment
Participants were asked to answer the following questions using an 5-point Likert scale ranging from 1 (strongly agree) to 5 (strongly disagree): (1) "I have opportunities during the day to look after my physical and mental health", (2) "I have an acceptable workload", (3) "I am treated with respect by the people I work with", (4) "I have the tools and equipment I need to do my job effectively", (5) "I feel confident in using workplace technologies to connect and collaborate with colleagues".

Wellbeing
Participants were asked to answer the following questions using an 11-point Likert scale ranging from 0 (not at all) to 10 (completely): (1) "Overall, how satisfied are you with your life nowadays?",(2) "Overall, how happy did you feel yesterday?",(3) "Overall, how anxious did you feel yesterday?",(4) "Overall, how satisfied are you with your current work responsibilities?".The first three listed questions are regularly used by the Office for National Statistics [37], the fourth was adapted by the survey creators to assess job satisfaction.

Statistical analysis
Descriptive statistics were calculated for all variables.To identify risk factors for happiness, anxiety, work satisfaction and life satisfaction.a two-step binary logistic regression analysis was used.Before examining possible associations between wellbeing (i.e., happiness, anxiety, life, and work satisfaction) and predictors, several variables were recoded for analysis.For wellbeing measures, a score of > 6 was coded to indicate high life or work satisfaction and happiness, and a score of > 5 indicated working on business as usual), all to allow a more comparable number of participants between groups.All 'Prefer not to say' and 'other' selections in the demographic and professional information were categorised as missing data for analysis (all percentages, across all three time points, can be found in Table 2).Lastly, in relation to Gender only males and females were included in analyses due to a small number of participants in 'I identify in another way' (consistently < 1% of the sample across all three time points; Table 2 provides more details).All participants completed all outcome measures fully.Following recoding, univariable binary regression was used to identify each variable that was associated with happiness, anxiety, work satisfaction and life satisfaction.Variables with a p-value < 0.25 were then included in a multivariable regression [50]; following the method of purposeful selection of covariates in logistic regression [50] that suggests that variables reaching significance at 0.25 indicate reasonable association with the outcome variable and should be retained for further analysis (e.g., as used in [51,52]).Values in the multivariable regression models were deemed significant if ≤ 0.05.

Results
In total, 1422 participants data was analysed from the May survey, n = 1194 for August, n = 1713 for June.Demographics of the sample can be found in Table 2. Table 3 presents counts and percentages of outcomes measures in May, June, and August of 2020.In summary, life satisfaction ranged from 42.6 to 51.9% across the three time points, job satisfaction ranged from 32.7 to 51.4%, happiness from 48.1 to 52.8%, and anxiety from 35.3 to 44.9%.

Univariate analyses outcomes
All univariable logistic regression outcomes for each wellbeing measure (i.e., happiness, anxiety, life satisfaction and work satisfaction) at each time point can be found in Supplementary information (Tables S1-3).All univariable associations significant at the < 0.25 level were entered into the subsequent multivariable logistic regressions.

Multivariable analyses outcomes
Results of multivariable binary logistic regression analysis for happiness is presented in Table 4. Consistently across the three time points, employees that reported using workplace wellbeing support and those who reported less opportunities to look after their mental and physical health were more likely to be unhappy.Other variables significant at one or two of the timepoints were: work type (COVID-19 vs. business as usual), having a long standing physical or mental health condition illness or disability, having line manager help and support, and having colleague help and support.Results of multivariable binary logistic regression analysis for anxiety is presented in Table 5. Consistently across the three time points, those who reported less opportunities to look after their mental and physical health were more likely to be anxious.Other variables significant at one or two of the timepoints were: ethnicity, civil service grade, having a long standing physical or mental health condition illness or disability, being a career, using workplace wellbeing support, having line manager help and support, and having colleague help and support.
Results of multivariable binary logistic regression analysis for work satisfaction is presented in Table 6.Consistently across the three time points, those who reported to have a less acceptable workload, had less supportive line manager and colleagues, and were younger in age were more likely to be unsatisfied with work.Other variables significant at one or two of the timepoints were: ethnicity, using workplace wellbeing support, having the tolls and equipment to work effectively, and being confident in using workplace technology to connect/collaborate.
Results of multivariable binary logistic regression analysis for life satisfaction is presented in Table 7. Consistently across the three time points, those with less opportunities to look after their mental and physical health and those with less supportive colleagues were more likely to be unsatisfied with their life.Other variables significant at one or two of the timepoints were: age, having a having a long standing physical or mental health condition illness or disability, using workplace wellbeing support, having a support line manager and being confident in using workplace technology to connect/collaborate.

Summary
In summary, Study 2 found between 42.6% and 51.9% of the sample to be satisfied with their life, 32.7-51.4% to be satisfied with their work, 48.1-52.8% to be happy, and 35.3-44.9% to be anxious across all three surveyed timepoints.The most consistent factor associated with better mental health across all three time points in three of the outcome measures, was those who reported more opportunities to look after their mental and physical health.9% to be anxious across all three surveyed timepoints (May, June, and August of 2020).The most consistent factor associated with better wellbeing across all three time points in three of the outcome measures, was those who reported more opportunities to look after their mental and physical health.
The authors believe this paper to be the first to examine the rate of UK emergency response civil servants during the COVID-19 pandemic.In the current study, a total of 17.9% of the sample met the threshold criteria for probable moderate anxiety, moderate depression, or PTSD collectively.At a more granular level, 15.2% met the threshold for probable depression, 9.7% anxiety, and 7.6% PTSD, suggesting this study found enhanced rates in comparison to standard pre-COVID UK estimates [53].However, more recent reports published by Public Health England [48] (now known as the UK Health Security Agency) suggest that one in six employees (~ 16%) in the workplace suffer with common mental health disorders, which is in line with findings from the current research.
The impact of the COVID-19 pandemic on mental health is extremely topical.For example, a recent systematic review and meta-analysis sought to report prevalence of depression, anxiety, insomnia, posttraumatic stress disorder, and psychological distress among COVID-19 affected populations.A total of 55 studies were included and a prevalence rate of 16.0% was reported for depression, 15.2% for anxiety, and 21.9% for PTSD [53], similar to the rates found in the current study.
In terms of specific frontline occupations, greater prevalence of mental health disorders whilst working through the COVID-19 pandemic has been shown in: UK frontline health and social care workers (e.g., 58% met the threshold for probable clinical significance for anxiety, depression or PTSD) [18]; intensive care unit staff (e.g., 45% met the threshold for probable clinical significance for severe depression, PTSD, severe anxiety, or problem drinking) [30]; and teachers (e.g., anxiety (17%), depression (19%), and stress (30%) [17].In summary, the current findings report lower rates in comparison to other well documented frontline occupations during COVID-19, but are marginally higher in comparison to the prevalence of common mental disorders in the workplace [48].This slight elevation could reflect that working from home on the frontline raises new challenges that may be associated with increased mental health concern (e.g., lack of social connection or blurred boundaries [7]), but not to the same level as challenges within face-to-face frontline occupations during the pandemic due to the nature of the work and responsibilities.For example, witnessing suffering, or death of, patients within frontline hospital or care settings has been linked to negative impacts on mental wellbeing both pre [54] and during the pandemic [55], and is a challenge those working from home were unlikely to face.
In relation to risk and resilience factors, we found that younger employees were more likely to experience a mental disorder.The significant association could be explained by that working during the pandemic, and contributing to the COVID-19 response, may have been the first time working on emergency response-based work for many younger staff.A recent paper documented mental health outcomes among civil servants aiding in COVID-19 control in China.Using the PHQ-9 and GAD-7, akin to the current study, in a total of 867 participants, 37% and 38% met the threshold criteria for depression and anxiety, respectively [56].This research found being younger, and having fewer years of work experience, were associated with poorer mental health outcomes [56], which supports the findings of the current research.
Additionally, we found that UK Civil Servants staff who reported lower resilience, personal wellbeing, productivity, or job satisfaction were more likely to report poorer mental health.In the wider literature, there are well documented relationships between resilience [57], productivity [58], job satisfaction [59] and mental health which support the findings of the current study.As a result, in this occupational context, it is recommended that workplaces should be seeking to continually build and improve employee resilience, essentially ensuring employees have necessary resources and skills to support themselves and others.For example, employees could seek to bolster resilience using social activities to increase social ties and support networks [13].Furthermore, staff could be monitored and checked in on in terms of job satisfaction and productivity to ensure they are performing for the organisation, and this translates to good wellbeing.Study 2 highlights the importance of this, as having supportive line managers and colleagues were associated with higher levels of wellbeing, across multiple time points and for multiple outcome measures.That is to say that improving social bonds between team members, ensuring that supervisors feel confident to identify potential mental health difficulties, and communicate comfortably with staff about them, whilst fostering a culture of mutual respect could be a key focus of organisational resilience enhancement [60,61].Our results also suggest that employers and staff should be proactive in supporting those who are younger and those who are seemingly less productive (e.g., not meeting performance goals or are displaying counterproductive work behaviour).Those who enjoy working from home were also less likely to have poor mental health whilst working from home, employers and organisations should seek to break common barriers to working from home and ensure the positive aspects are maximised to increase staff experience [62].
The current paper also found non-significant associations for whether participants were actively working on the COVID-19 response, which suggests that actively responding to COVID-19 was not, in itself, a specific factor influencing staff mental health.This finding is also supported by recent research [56] which also found no difference between frontline and non-frontline workers both in depression and anxiety severity among civil servants.It is suggested that due to secondments and staff movement to aid the pandemic response, the BAU roles became busier due to teams operating with reduced numbers of staff but still needed to meet the same targets, in essence non-responding civil servants also experienced a rise in workload and demands [56].

Limitations
Despite being the first paper (to the authors' knowledge) to establish rates of mental health issues using standardised and validated measures in a sample of UK Government response employees, the research is not without limitation.For Study 1 specifically, despite  exhausting possible survey distribution routes, gaining engagement with a busy taskforce was difficult, resulting in a small, underpowered sample.Secondly, the data was collected between May and August 2022, when the pandemic response was beginning to 'wind down' (i.e., less COVID-19 cases, lower work demands), meaning that some individuals who had been working on the COVID-19 response may have left the organisation (either due to contracts ending, or potentially if they had negative experiences, akin to the healthy worker effect [63]) which also suggests a potential bias in the sample; Thirdly, this data is cross-sectional; measuring and tracking mental health incidence longitudinally would provide more robust findings, as well as aid with inferring causation.Fourthly, it is important to consider that the survey did not collected data on when exactly employees were working during the pandemic (e.g., during lockdowns, virus surges).We suggest that future research examining wellbeing during public health emergencies should be longitudinal in method as this would allow for examinations over time where additional factors (such as external factors like virus prevalence, and restrictions) could be included in analyses.The authors believe that many limitations associated with Study 1 are addressed by Study 2; as the data used in the secondary data analysis consisted of a large sample of participants, collected during the height of the COVID-19 pandemic across multiple time points.Unfortunately, Study 2 did not use standardised mental health measures (as used in the first study) and instead used wellbeing measures; however, wellbeing is reported in the literature as being closely linked with, and a key feature of mental health [64].Additionally, Study 2 data did not provide the opportunity to restrict to different occupations within the one select government organisation participants were from.However, the organisation is response-focused, and as noted in the discussion (in relation to Study 1 findings), it is suggested that even business as usual roles became busier due to teams operating with reduced numbers of staff (e.g., due to secondments, staff movement), suggesting that the impact of the COVID-19 pandemic could be felt by all staff.In summary, Study 2 sought to overcome the difficulties and limitations of Study 1. Study 1 provided a cross-sectional insight into response-focused civil servants mental health and wellbeing experiences as they were exiting the COVID-19 period.The authors acknowledge the caveats apparent with Study 1. Study 2 instead provided cross-sectional snapshots of wellbeing in civil servants collected across three time periods (during the heightened pandemic), allowing for concurrent evaluation of employee wellbeing alongside understanding change over time -and identification of consistent influential factors over time.Combined, this research provides the first clear estimates of common mental health disorders in the  UK Government frontline employees, using standardised and validated measures, as well as associated risk and resilience factors.

Conclusion
The rates of common mental health disorders in home working frontline UK civil servants during the COVID-19 pandemic were lower in comparison to other well documented frontline occupations during the pandemic [17,18,30], but remain slightly higher in comparison to the rates of common mental disorders in the workplace [48].Younger, less resilient, less productive individuals, with lower personal wellbeing and less enjoyment for working from home, were more likely to present with poorer mental health outcomes.As were those without opportunities to look after their physical and mental health, or those without supportive line managers and colleagues.
As a result, it is important to ensuring civil servants psychological needs are met whilst responding to enhanced incidents, such as the COVID-19 pandemic.

Table 1
Sample characteristics and binary logistic regression results (study 1)

Table 2
Demographics of sample (study 2) August of 2022).Younger, less resilient, less productive individuals, with lower personal wellbeing and less enjoyment for working from home, were more likely to present with poorer mental health.Study 2 found between 42.6% and 51.9% of the sample to be satisfied with their life, 32.7-51.4% to be satisfied with their work, 48.1-52.8% to be happy, and35.3-44.

Table 3
Counts and percentages of outcome measures in May, June and August of 2020

Table 4
Multivariable binary logistic regression outcomes for happiness across three time points (May, June, and August of 2020)

Table 5
Multivariable binary logistic regression outcomes for anxiety across three time points (May, June, and August of 2020)

Table 6
Multivariable binary logistic regression outcomes for work satisfaction across three time points (May, June, and August of 2020)

Table 7
Multivariable binary logistic regression outcomes for life satisfaction across three time points (May, June, and August of 2020)